I have a Dell Precision 450 (Win7 Ultimate x64). We were moving house, so it spend a good bit of time in a storage unit, just set it up a few days ago (hasn't worked since I got it back).
When I power up everything looks fine.. Then I get to "Press C+A+D to login", when I do it displays the usernames, login background as normal. If I try click on something (anything, even 'blank' screen (wallpaper) or sometimes just moving the mouse will cause the entire screen to go black (actually 3x monitors). Cursor is still visible and moves, will move between monitors ok.
Pressing CAD again will bring back the login screen for a second, moving the mouse etc goes back to black.
I read about DirectX updates causing similar problem so booted into safe-mode successfully (works fine for safe-mode, so in my limited experience this tells me it may be a driver issue).
Did a system restore (earliest I could), no luck. Rolled back drivers for my graphics card (Radeon Sapphire), no luck..
Any ideas/suggestions very much appreciated!
Answer
If you're experiencing visual artifacts when you move the mouse, and they disappear in safe mode then it's definitely an issue with your graphics driver or your video card. Did you try with less monitors connected? 3 monitors could possible be causing a problem with your video card, i.e. the combined resolutions you set could not be supported by the available bandwidth on your card. First try lower resolutions and less monitors. Also update your driver to the latest version, don't roll back, the latest drivers will have the latest fixes for such issues. If these don't fix it do a clean install of the graphics driver (i.e. remove the old driver completely, google for how to do this).
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